Question

How to escape single quotes in a MySQL INSERT?

Asked by: Octalys

I have this in my code

$sql = "INSERT INTO `contractProducts` (`clientId`,`productId`,`productStatus`,`productBTW`,`productPaymentperiod`,`productRef`,`productDescription`,`productPrice`,`productDay`,`productMonth`)  VALUES ('".$session{form}{clientId}."', '".$session{form}{productId}."', '0', '".$session{form}{productBTW}."', '".$session{form}{productPaymentperiod}."', '".$session{form}{productRef}."', '".$session{form}{productDescription}."', '".$session{form}{productPrice}."', '".$session{form}{productDay}."', '".$count."');";

And $session{form}{productDescription} contains '' in the text, it makes mysql throwing an error back.

How can I escape it? I dont want to escape it in the text, I want to escape it in the code, q, qq etc all doesnt work.

Thx

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Asked On
2005-08-15 at 02:11:54ID21527072
Tags

mysql

,

escape

,

insert

,

single

,

quote

Topic

Perl Programming Language

Participating Experts
3
Points
500
Comments
3

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Answers

 

by: amit_gPosted on 2005-08-15 at 02:17:35ID: 14673206

Escape with a \ i.e. YourStringContainingAQuote\'OrADoubleQuote\"

 

by: ozoPosted on 2005-08-15 at 03:12:40ID: 14673372

$sql = "INSERT INTO `contractProducts` (`clientId`,`productId`,`productStatus`,`productBTW`,`productPaymentperiod`,`productRef`,`productDescription`,`productPrice`,`productDay`,`productMonth`)  VALUES ('$session{form}{clientId}', '$session{form}{productId}', '0', '$session{form}{productBTW}', '$session{form}{productPaymentperiod}', '$session{form}{productRef}', '\Q$session{form}{productDescription}\E', '$session{form}{productPrice}', '$session{form}{productDay}', '$count');";

 

by: davorgPosted on 2005-08-15 at 07:41:01ID: 14674791

Two alternatives:

1/ Use the DBI "quote" function.

$sql = "INSERT INTO `contractProducts` (`clientId`,`productId`,`productStatus`,`productBTW`,`productPaymentperiod`,`productRef`,`productDescription`,`productPrice`,`productDay`,`productMonth`)  VALUES ('". $dbh->quote($session{form}{clientId})."', '".$dbh->quote($session{form}{productId})."', '0', '".$dbh->quote($session{form}{productBTW})."', '".$dbh->quote($session{form}{productPaymentperiod})."', '".$dbh->quote($session{form}{productRef})."', '".$dbh->quote($session{form}{productDescription})."', '".$dbh->quote($session{form}{productPrice})."', '".$dbh->quote($session{form}{productDay})."', '".$count."');";

2/ (much better) Use placeholders in your SQL.

$sql = 'INSERT INTO `contractProducts` (`clientId`,`productId`,`productStatus`,`productBTW`,`productPaymentperiod`,`productRef`,`productDescription`,`productPrice`,`productDay`,`productMonth`)  VALUES ('?,?,?,?,?,?,?,?,?,?');";

my $sth = $dbh->prepare($sql);

$sth->execute($session{form}{clientId}, $session{form}{productId}, 0, $session{form}{productBTW}, $session{form}{productPaymentperiod}, $session{form}{productRef}, $session{form}{productDescription}, $session{form}{productPrice}, $session{form}{productDay}, $count);

The placeholder alternative is much better as it makes your SQL far easier to understand. It handles all of the quoting for you.

Actually, there's a third alternative, which is what I'd use - use a module like Class::DBI and remove all of the SQL from your code :)

Dave...

20120131-EE-VQP-002

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